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padilas [110]
3 years ago
7

PLS HELP ASAP NEED FOR A TEST

Mathematics
1 answer:
horrorfan [7]3 years ago
4 0

Answer:

The answer in the procedure

Step-by-step explanation:

Let

x----> the first number

y----> the second number

we know that

\frac{x}{y}=\frac{3}{4}

so

y=\frac{4}{3}x -----> equation A

x+y=35 ----> equation B

substitute equation A in equation B

x+\frac{4}{3}x=35

\frac{3x+4x}{3}=35

\frac{7}{3}x=35    

x=35*3/7=15

y=35-15=20

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Homework: 5.1 Systems of Linear Equations
Klio2033 [76]

Answer:

\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}

x=8,\:y=5

Step-by-step explanation:

Given the system of linear equations

7x-y=51

x+3y=23

solving by the elimination method

\begin{bmatrix}7x-y=51\\ x+3y=23\end{bmatrix}

\mathrm{Multiply\:}x+3y=23\mathrm{\:by\:}7\:\mathrm{:}\:\quad \:7x+21y=161

\begin{bmatrix}7x-y=51\\ 7x+21y=161\end{bmatrix}

7x+21y=161

-

\underline{7x-y=51}

22y=110

so

\begin{bmatrix}7x-y=51\\ 22y=110\end{bmatrix}

now solving for y

22y=110

\mathrm{Divide\:both\:sides\:by\:}22

\frac{22y}{22}=\frac{110}{22}

y=5

\mathrm{For\:}7x-y=51\mathrm{\:plug\:in\:}y=5

7x-y=51

7x-5=5

7x=56

\mathrm{Divide\:both\:sides\:by\:}7

\frac{7x}{7}=\frac{56}{7}

x=8

\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}

x=8,\:y=5

7 0
3 years ago
3 1/2 x 2 1/2 as a mixed number in simplest form. if correct you get brainliest
Helga [31]

Answer:

8 3/ 4

Step-by-step explanation:

3 1/ 2

×  

2 1 /2

=      

7 × 5

2 × 2

=  

35 /4

=  

8 3 /4

4 0
3 years ago
Read 2 more answers
7) CJ was painting his apartment. In 15 minutes,
igomit [66]

y = 12x represents the gallons of paint used in x hours.

Step-by-step explanation:

CJ uses 3 gallons of paint in 15 minutes,

15 minutes = 3 gallons

1 minutes = \frac{3}{15} = \frac{1}{5} \ gallons\\

1 hour = 60 minutes

Gallons of paint used in 1 hour;

1 hour = \frac{1}{5}*60=12\ gallons

CJ uses 12 gallons of paint in 1 hour.

For x hours = 12*x = 12x

Gallons of paints used = y

y = 12x represents the gallons of paint used in x hours.

Keywords: linear equation, multiplication

Learn more about multiplication at:

  • brainly.com/question/10048445
  • brainly.com/question/10177389

#LearnwithBrainly

5 0
3 years ago
Round 22360 to 1 significant figure
lions [1.4K]
The answer to your question would be 20,000. Hope it helps! :)
5 0
4 years ago
Read 2 more answers
1. Kari is making copies at a local copy store of the program for her school play. She makes 52 copies and the total cost is $6.
Leona [35]
The first one is 2.78% second one is 3.8% third one is 4.5% and it will be 378
8 0
3 years ago
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